The AXA HR-traction is the top of the AXA range of dynamos. It's a good quality and long lasting dynamo with low drag, low noise and replaceable rubber roller.
For those who concern themselves about weight, it's also relatively light weight ( 0.2 kg )
The dynamo is supplied with a connector (two sets of "live" and "earth" are provided for both front and rear lights). It includes a zener diode to regulate output, which prevents damage to lights due to over voltage.